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《计算机组成及汇编语言原理》学习第 7 天，p116-p120 总结，总计 5 页。
一、技术总结
1.CPU优化
(1)increase overall performance number
例如：16位电脑提升到32位电脑。
(2)multiprocessing
One way to make computers more useful is to allow them to run more than one program at a time.——不是很确定这里指的是不是“多进程”。
Rather than relying on the good citizenship of each user program, the solution is to create a special überprogram called the operating system, whose primary job is to act as a program control program, as in “program to control [other] programs,” and enforcer of the security rules.——这种方式的实现是通过操作系统来进行的。
(3)Instruction Set optimization
(4)pipelining
(5)Superscalar Architecture
二、英语总结(生词：2)
1.vacation condominium
(1)condo: condominium 的缩写
表示公寓的常见单词有 apartment/flast，condo。apartment/flat和 condo的区别是：apartment/flat的住户对房屋没有所有权，condao的住户对房屋有所有权。apartment 和 flat 的区别是 apartment 在美式英语中用得比较多，flat 在英式英语中用得比较多。
p116, As with time-sharing a vacation condominium, time is divided into slices (weeks for the condo, perhaps milli- or microseconds for the CPU), and you are allowed to use the equipment for one slice.
刚开始看这句话很懵，“vacation condominium” 和 CPU 有什么关系呢？查了一下 “as with” 的意思 “in the same way as”——好吧，对这个词没理解对，刚开始理解成了“with”，其实是 “like” 的意思，作者这是在类比。
2.citizenship
(1)citizenship: citizen + -ship
(2)citizen: cite(city) + -ain(-ian)
u.Citizenship is also carrying out the duties and responsibilities of a member of a particular society.
p117, Rather than relying on the good citizenship of each user program, the solution is to create a special überprogram called the operating system, whose primary job is to act as a program control program, as in “program to control [other] programs,” and enforcer of the security rules.
三、其它
今天没有什么想说的。
四、参考资料
1. 编程
(1) Patrick Juola，《计算机组成及汇编语言原理》：https://book.douban.com/subject/3069889/
2. 英语
(1) Etymology Dictionary：https://www.etymonline.com
(2) Cambridge Dictionary：https://dictionary.cambridge.org
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